Volatile Components of the Cyanobacterium Oscillatoria perornata (Skuja)

Abstract

Volatile compounds were identified from unialgal continuous cultures of the cyanobacterium Oscillatoria perornata. Steam distillates of the unialgal cultures were continuously extracted with pentane, and the pentane extracts were analyzed by GC-MS. Retention indices and mass spectral data were used to identify 15 components. Relative amounts of individual components were expressed as percent peak area relative to total peak area. The main volatile components were heptadecane (57.0%), 2-methylisoborneol (29.4%), and benzaldehyde (1.2%). Together with the previously known 2-methylisoborneol, which is the major cause of the musty off-flavor problem in catfish farming operations in Mississippi, other components identified were dimethyl disulfide (1.0%), dimethyl trisulfide (0.5%), and benzothiazole (0.6%). These compounds and their organoleptic characteristics are discussed in relation to their possible contributions to cultured catfish off-flavor problems.

Bioactive phenols in algae: The application of pressurized-liquid and solid-phase extraction techniques

“…Benzaldehyde and selected volatile organic compounds were previously analyzed by gas chromatography-MS in pentane extracts prepared from cyanobacterium Oscillatoria perornata [33]. In addition, p-hydroxybenzaldehyde was found in the red alga Corallina pilulifera using MS and NMR methods [34].…”

Cyanobacteria from coastal lagoons in southern Brazil: non-heterocytous filamentous organisms

“…Non-heterocytous fi lamentous cyanobacteria are known to cause livestock mortality, can adversely affect human health (Fastner et al 1999, Baker et al 2001, Tellez et al 2001, Prati et al 2002, and are recognized as important contributors to ecosystem degradation (or one of the consequences of that degradation) (McGregor 2007). But in spite of their ecological importance, there have been very few comprehensive regional studies of these organisms.…”

Biosynthesis of the Off‐Flavor 2‐Methylisoborneol by the Myxobacterium Nannocystis exedens

“…Highly complex profiles of volatiles are emitted by streptomycetes and myxobacteria, [2][3][4][5][6][7] and the frequently found musty or earthy smelling terpenoids 2-methylisoborneol (1) and geosmin (2) have extremely low odor thresholds. Compound 1, a homomonoterpene, was first identified in Streptomyces lavendulae, [8] and later in several other actinomycetes, [6,9] cyanobacteria, [10] fungi, [11] and a liverwort, where it occurs as the (À)-enantiomer. [12] Especially cyanobacteria can cause contaminations of freshwater with the undesirable flavor (off-flavor) 1, that can result in significant economic losses in fishery.…”